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Costs and Estimated Earnings on Uncompleted Contracts (Details 1) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Summary of costs and estimated earnings amounts on uncompleted contracts included in balance sheets    
Costs and estimated earnings in excess of billings on uncompleted contracts $ 324,370 $ 36,476
Billings in excess of cost and estimated earnings on uncompleted contracts (26,999) (69,789)
Cost in excess of billing on uncompleted contracts, net $ 297,371 $ (33,313)